You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
154 lines
3.3 KiB
154 lines
3.3 KiB
From: Felix Fietkau <nbd@openwrt.org>
|
|
Date: Wed, 8 Jul 2015 13:56:37 +0200
|
|
Subject: [PATCH] Add PowerPC soft-float support
|
|
|
|
Some PowerPC CPUs (e.g. Freescale MPC85xx) have a completely different
|
|
instruction set for floating point operations (SPE).
|
|
Executing regular PowerPC floating point instructions results in
|
|
"Illegal instruction" errors.
|
|
|
|
Make it possible to run these devices in soft-float mode.
|
|
|
|
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
|
|
---
|
|
create mode 100644 src/fenv/powerpc-sf/fenv.sub
|
|
create mode 100644 src/setjmp/powerpc-sf/longjmp.s
|
|
create mode 100644 src/setjmp/powerpc-sf/longjmp.sub
|
|
create mode 100644 src/setjmp/powerpc-sf/setjmp.s
|
|
create mode 100644 src/setjmp/powerpc-sf/setjmp.sub
|
|
|
|
--- a/arch/powerpc/reloc.h
|
|
+++ b/arch/powerpc/reloc.h
|
|
@@ -1,4 +1,10 @@
|
|
-#define LDSO_ARCH "powerpc"
|
|
+#ifdef _SOFT_FLOAT
|
|
+#define FP_SUFFIX "-sf"
|
|
+#else
|
|
+#define FP_SUFFIX ""
|
|
+#endif
|
|
+
|
|
+#define LDSO_ARCH "powerpc" FP_SUFFIX
|
|
|
|
#define TPOFF_K (-0x7000)
|
|
|
|
--- a/configure
|
|
+++ b/configure
|
|
@@ -498,6 +498,10 @@ trycppif "_MIPSEL || __MIPSEL || __MIPSE
|
|
trycppif __mips_soft_float "$t" && SUBARCH=${SUBARCH}-sf
|
|
fi
|
|
|
|
+if test "$ARCH" = "powerpc" ; then
|
|
+trycppif _SOFT_FLOAT "$t" && SUBARCH=${SUBARCH}-sf
|
|
+fi
|
|
+
|
|
test "$ARCH" = "microblaze" && trycppif __MICROBLAZEEL__ "$t" \
|
|
&& SUBARCH=${SUBARCH}el
|
|
|
|
--- /dev/null
|
|
+++ b/src/fenv/powerpc-sf/fenv.sub
|
|
@@ -0,0 +1 @@
|
|
+../fenv.c
|
|
--- /dev/null
|
|
+++ b/src/setjmp/powerpc-sf/longjmp.s
|
|
@@ -0,0 +1,47 @@
|
|
+ .global _longjmp
|
|
+ .global longjmp
|
|
+ .type _longjmp,@function
|
|
+ .type longjmp,@function
|
|
+_longjmp:
|
|
+longjmp:
|
|
+# void longjmp(jmp_buf env, int val);
|
|
+# put val into return register and restore the env saved in setjmp
|
|
+# if val(r4) is 0, put 1 there.
|
|
+ # 0) move old return address into r0
|
|
+ lwz 0, 0(3)
|
|
+ # 1) put it into link reg
|
|
+ mtlr 0
|
|
+ #2 ) restore stack ptr
|
|
+ lwz 1, 4(3)
|
|
+ #3) restore control reg
|
|
+ lwz 0, 8(3)
|
|
+ mtcr 0
|
|
+ #4) restore r14-r31
|
|
+ lwz 14, 12(3)
|
|
+ lwz 15, 16(3)
|
|
+ lwz 16, 20(3)
|
|
+ lwz 17, 24(3)
|
|
+ lwz 18, 28(3)
|
|
+ lwz 19, 32(3)
|
|
+ lwz 20, 36(3)
|
|
+ lwz 21, 40(3)
|
|
+ lwz 22, 44(3)
|
|
+ lwz 23, 48(3)
|
|
+ lwz 24, 52(3)
|
|
+ lwz 25, 56(3)
|
|
+ lwz 26, 60(3)
|
|
+ lwz 27, 64(3)
|
|
+ lwz 28, 68(3)
|
|
+ lwz 29, 72(3)
|
|
+ lwz 30, 76(3)
|
|
+ lwz 31, 80(3)
|
|
+ #5) put val into return reg r3
|
|
+ mr 3, 4
|
|
+
|
|
+ #6) check if return value is 0, make it 1 in that case
|
|
+ cmpwi cr7, 4, 0
|
|
+ bne cr7, 1f
|
|
+ li 3, 1
|
|
+1:
|
|
+ blr
|
|
+
|
|
--- /dev/null
|
|
+++ b/src/setjmp/powerpc-sf/longjmp.sub
|
|
@@ -0,0 +1 @@
|
|
+longjmp.s
|
|
--- /dev/null
|
|
+++ b/src/setjmp/powerpc-sf/setjmp.s
|
|
@@ -0,0 +1,43 @@
|
|
+ .global ___setjmp
|
|
+ .hidden ___setjmp
|
|
+ .global __setjmp
|
|
+ .global _setjmp
|
|
+ .global setjmp
|
|
+ .type __setjmp,@function
|
|
+ .type _setjmp,@function
|
|
+ .type setjmp,@function
|
|
+___setjmp:
|
|
+__setjmp:
|
|
+_setjmp:
|
|
+setjmp:
|
|
+ # 0) store IP int 0, then into the jmpbuf pointed to by r3 (first arg)
|
|
+ mflr 0
|
|
+ stw 0, 0(3)
|
|
+ # 1) store reg1 (SP)
|
|
+ stw 1, 4(3)
|
|
+ # 2) store cr
|
|
+ mfcr 0
|
|
+ stw 0, 8(3)
|
|
+ # 3) store r14-31
|
|
+ stw 14, 12(3)
|
|
+ stw 15, 16(3)
|
|
+ stw 16, 20(3)
|
|
+ stw 17, 24(3)
|
|
+ stw 18, 28(3)
|
|
+ stw 19, 32(3)
|
|
+ stw 20, 36(3)
|
|
+ stw 21, 40(3)
|
|
+ stw 22, 44(3)
|
|
+ stw 23, 48(3)
|
|
+ stw 24, 52(3)
|
|
+ stw 25, 56(3)
|
|
+ stw 26, 60(3)
|
|
+ stw 27, 64(3)
|
|
+ stw 28, 68(3)
|
|
+ stw 29, 72(3)
|
|
+ stw 30, 76(3)
|
|
+ stw 31, 80(3)
|
|
+ # 4) set return value to 0
|
|
+ li 3, 0
|
|
+ # 5) return
|
|
+ blr
|
|
--- /dev/null
|
|
+++ b/src/setjmp/powerpc-sf/setjmp.sub
|
|
@@ -0,0 +1 @@
|
|
+setjmp.s
|
|
|